chore(travis,grunt): extract the npm install and cache busting logic into install-dependencies.sh

So now we are DRY.

Added extra error checking and improved the grunt file init setup so that stdio is visible in console.

Closes angular#11110

Author: IgorMinar

.travis.yml

@@ -46,10 +46,8 @@ install:
   # Log HTTP requests
   - npm config set loglevel http
   - npm install -g npm@2.5
-  # Instal npm dependcies and ensure that npm cache is not stale (these steps are replicated in lib/grunt/utils.js)
-  - diff -q npm-shrinkwrap.json node_modules/npm-shrinkwrap.cached.json; if [[ $? -ne 0 ]]; then echo 'Shrinkwrap changed! Blowing away node_modules.'; rm -rf node_modules; fi
-  - time npm install
-  - cp npm-shrinkwrap.json node_modules/npm-shrinkwrap.cached.json
+  # Instal npm dependecies and ensure that npm cache is not stale
+  - scripts/npm/install-dependencies.sh
 
 before_script:
   - mkdir -p $LOGS_DIR

Gruntfile.js

@@ -17,10 +17,6 @@ module.exports = function(grunt) {
   NG_VERSION.cdn = versionInfo.cdnVersion;
   var dist = 'angular-'+ NG_VERSION.full;
 
-  //global beforeEach
-  util.init();
-
-
   //config
   grunt.initConfig({
     NG_VERSION: NG_VERSION,
@@ -285,6 +281,10 @@ module.exports = function(grunt) {
     },
 
     shell: {
+      "npm-install": {
+        command: 'scripts/npm/install-dependencies.sh'
+      },
+
       "promises-aplus-tests": {
         options: {
           stdout: false,
@@ -311,6 +311,10 @@ module.exports = function(grunt) {
     }
   });
 
+  // global beforeEach task
+  if (!process.env.TRAVIS) {
+    grunt.task.run('shell:npm-install');
+  }
 
   //alias tasks
   grunt.registerTask('test', 'Run unit, docs and e2e tests with Karma', ['jshint', 'jscs', 'package','test:unit','test:promises-aplus', 'tests:docs', 'test:protractor']);

lib/grunt/utils.js

@@ -14,16 +14,6 @@ var CSP_CSS_HEADER = '/* Include this file in your html if you are using the CSP
 
 module.exports = {
 
-  init: function() {
-    if (!process.env.TRAVIS) {
-      // replicated from .travis.yaml
-      shell.exec("diff -q npm-shrinkwrap.json node_modules/npm-shrinkwrap.cached.json; if [[ $? -ne 0 ]]; then echo 'Shrinkwrap changed! Blowing away node_modules.'; rm -rf node_modules; fi");
-      shell.exec('npm install');
-      shell.exec('cp npm-shrinkwrap.json node_modules/npm-shrinkwrap.cached.json');
-    }
-  },
-
-
   startKarma: function(config, singleRun, done){
     var browsers = grunt.option('browsers');
     var reporters = grunt.option('reporters');

scripts/clean-shrinkwrap.js scripts/npm/clean-shrinkwrap.js

@@ -10,6 +10,7 @@
 var _ = require('lodash');
 var sorted = require('sorted-object');
 var fs = require('fs');
+var path = require('path');
 
 
 function cleanModule(module, name) {
@@ -27,10 +28,11 @@ function cleanModule(module, name) {
 
 
 console.log('Reading npm-shrinkwrap.json');
-var shrinkwrap = require('./../npm-shrinkwrap.json');
+var shrinkwrap = require('../../npm-shrinkwrap.json');
 
 console.log('Cleaning shrinkwrap object');
 cleanModule(shrinkwrap, shrinkwrap.name);
 
-console.log('Writing cleaned npm-shrinkwrap.clean.json');
-fs.writeFileSync('./npm-shrinkwrap.clean.json', JSON.stringify(sorted(shrinkwrap), null, 2) + "\n");
+var cleanShrinkwrapPath = path.join(__dirname, '..', '..', 'npm-shrinkwrap.clean.json');
+console.log('Writing cleaned to', cleanShrinkwrapPath);
+fs.writeFileSync(cleanShrinkwrapPath, JSON.stringify(sorted(shrinkwrap), null, 2) + "\n");

scripts/npm/install-dependencies.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+set -e
+
+SHRINKWRAP_FILE=npm-shrinkwrap.json
+SHRINKWRAP_CACHED_FILE=node_modules/npm-shrinkwrap.cached.json
+
+if diff -q $SHRINKWRAP_FILE $SHRINKWRAP_CACHED_FILE; then
+  echo 'No shrinkwrap changes detected. npm install will be skipped...';
+else
+  echo 'Blowing away node_modules and reinstalling npm dependencies...'
+  rm -rf node_modules
+  npm install
+  cp $SHRINKWRAP_FILE $SHRINKWRAP_CACHED_FILE
+  echo 'npm install successful!'
+fi